I have a95 f150 with the 302 and the 4r70w 4wd transmission. It has been slipping a lot before just when down shifting from OD and from 4th. Recently has been slipping every down shift and when starting out up fluid is full and actually looks good and didn't smell burnt. Found a transmission for a 96 at a junkyard has different part numbers on auto zone website but the guy at the junk yard thinks it's just the neutral safety switch is different can anyone she'd some light on the subject and possibly tell me exactly what is different with it